Rename layout zones

gui/app/components/layout/bottom-bar.js

@@ -9,10 +9,11 @@
 //
 // https://documize.com
 
-// import $ from 'jquery';
+import { inject as service } from '@ember/service';
 import Component from '@ember/component';
 
 export default Component.extend({
 	classNames: ['layout-footer'],
-	tagName: 'footer'
+	tagName: 'footer',
+	appMeta: service()
 });

gui/app/components/layout/middle-zone.js

@@ -0,0 +1,18 @@
+// Copyright 2016 Documize Inc. <legal@documize.com>. All rights reserved.
+//
+// This software (Documize Community Edition) is licensed under
+// GNU AGPL v3 http://www.gnu.org/licenses/agpl-3.0.en.html
+//
+// You can operate outside the AGPL restrictions by purchasing
+// Documize Enterprise Edition and obtaining a commercial license
+// by contacting <sales@documize.com>.
+//
+// https://documize.com
+
+// import $ from 'jquery';
+import Component from '@ember/component';
+
+export default Component.extend({
+	classNames: ['layout-body'],
+	tagName: 'main'
+});